Happy St Nicholas Day: Re-Launching the IPv6 ULA registry

[Nico Schottelius <[e-mail]>]

Good morning,

we have just launched a ULA registry [0] as part of our IPv6 advent
calander [1]. While the reception, openness and opinions of whether or
not there should be a ULA registry at all differ, a ULA registry has
been requested multiple times from our customers in the past.

The source code of the ULA registry is fully Open Source and can be
found on [2]. It currently operates using the fd00::/8 subnet, whereas
draft-hain-ipv6-ulac-02 [3] suggests that RFC4193 should be followed for
that subnet and fc00::/8 should have been taken for a ULA registry.

However the original SixXS database records [4] on which we based our
work operatios in fd00::/8 and according to wikipedia [5] there is no
consensus over fc00::/8 in the IETF.

Speaking for ungleich, we do not use ULA ourselves, however our users
do. In this regard our position is somewhat neutral with the focus of
"enable users to move forward with IPv6".

However in the spirit of collaboration and finding a consensus for a ULA
registration, we could imagine phasing in fc00::/8 as the default prefix
for generating new prefixes while keeping the historic information of
the previously registered prefixes that originally came from SixXS.

Looking forward to your feedback.

Best regards from the snowy mountains in Switzerland,

Nico

[0] https://ula.ungleich.ch/
[1] https://ungleich.ch/u/advent-calendar/06/
[2] https://code.ungleich.ch/ungleich-public/ipv6ula
[3] https://tools.ietf.org/html/draft-hain-ipv6-ulac-02
[4] https://www.sixxs.net/tools/grh/ula/list/
[5] https://en.wikipedia.org/wiki/Unique_local_address

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